TTEC Customer Setvice Representative interview questions

I first applied online but then went in for an interview because I figured it would be quicker. The ad said $500 sign on bonus and $12 an hour to start. They had me take a computer assessment to see if my qualifications were fit for the job. They said congrats I'm hired, I start June 13, $10 an hour, no mention of sign on bonus. They said the $12 an hour was for a position they werent hiring for yet. Then I got an email about a week later saying that they felt my experience was not fitting the requirements for the job and I wont be able to work for them. I didnt like them from the start but I needed a paycheck. Also the little computer orientation that they had said its a casual atmosphere and we could wear jeans... I mean why not when its a call center an no one sees us. However the interviewer said that its business casual.